287425257 has 32 divisors (see below), whose sum is σ = 451018752. Its totient is φ = 159413184.

The previous prime is 287425247. The next prime is 287425277. The reversal of 287425257 is 752524782.

It is not a de Polignac number, because 287425257 - 2⁴ = 287425241 is a prime.

It is a super-2 number, since 2×287425257² = 165226556723032098, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (287425247) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 124203 + ... + 126495.

It is an arithmetic number, because the mean of its divisors is an integer number (14094336).

Almost surely, 2^287425257 is an apocalyptic number.

It is an amenable number.

287425257 is a deficient number, since it is larger than the sum of its proper divisors (163593495).

287425257 is a wasteful number, since it uses less digits than its factorization.

287425257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2477.

The product of its digits is 313600, while the sum is 42.

The square root of 287425257 is about 16953.6207637189. The cubic root of 287425257 is about 659.9458610321.

The spelling of 287425257 in words is "two hundred eighty-seven million, four hundred twenty-five thousand, two hundred fifty-seven".